T/ZNX 004-2021 Drone-based spraying guide for controlling pine wood nematodes using trunk punching injection

Scope

Main technical content: Pharmaceutical injection and bottle insertion: - Locate the injection hole according to the spiral pattern and the sawdust extracted during drilling. - Open the container bottle injection port and insert the injection head into the injection hole. - Gently tap the bottom of the container, then use a drilling needle to open the air hole at the bottom of the container. - Start injecting the drug solution using the natural drip method. - Ensure that the bottle layer is flush with the tree trunk during insertion to guarantee that the drug solution penetrates the xylem of coniferous trees and avoid drug leakage. - Bottle removal: - After injection, check the observation line (the white transparent part at the junction of the bottle label) based on the nature of the drug (different drugs have different penetration times). - Determine whether the drug solution has completely penetrated. - If residual drug remains in the drug bottle after other injection holes of the same drug have completely penetrated, press the bottom ventilation hole, remove the drug bottle, and squeeze out the resin inside the bottle mouth. - Re-drill or insert the injection hole of another removed bottle until the drug solution completely penetrates. - Plugging the injection hole: - After removing the empty bottle, use a disinfected healing material (wood plug) to plug the injection hole. - Use a sheep-horn hammer to flatten the healing plug to prevent rainwater leakage or infection of other pathogens, causing damage to coniferous trees. - Scientific drug application: - The injection dose is allocated according to the diameter of the trunk and the nature of the drug. - Refer to "NY/T 1276—2007" to select high-efficiency, low-toxicity drugs that can be transmitted through sap flow and have minimal environmental impact. - According to the principle of resistance management of diseases, scientifically rotate or use mixed pestic

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